- #1
What is the Direction of the Magnetic Field in a Circular Wire?
AI Thread Summary
The discussion centers on determining the direction of the magnetic field in a circular wire. It clarifies that while the magnetic force can be zero when acting along the radius, this does not apply when considering the overall magnetic field from a source at the origin. A magnetic field perpendicular to the plane of the loop results in zero force, but there remains a radial component. The participant realizes that the radial field contributes to the magnetic force, leading to a clearer understanding of the problem. Ultimately, the inquiry helps clarify the relationship between magnetic fields and forces in this context.
- #2
dacruick
- 1,038
- 1
I'm not so sure what this question is even asking. If there is a magnetic field from a source at the origin, and you place a ring around it, wouldn't the overall magnetic force due to that source be 0?
- #3
cupid.callin
- 1,130
- 1
No it won't be
mag force will only be 0 when it is acting along radius.
It won't in the case i told you and neither if source is at origin!
in your case ... field perpendicular to the plane of loop will give 0 force but there still will be a field along radius!
Hey hang on ... it got it!
your question gave me the answer!
the field left along radius in your case will give force and that's the answer!
Thanks for the question !
mag force will only be 0 when it is acting along radius.
It won't in the case i told you and neither if source is at origin!
in your case ... field perpendicular to the plane of loop will give 0 force but there still will be a field along radius!
Hey hang on ... it got it!
your question gave me the answer!
the field left along radius in your case will give force and that's the answer!
Thanks for the question !
Neglect gravity other than that of water; neglect friction.
F1=ρgsh=1000*10*1*(1+4)=50000 N;
F1=ρgsh=1000*10*0.1*4=4000 N;
F3=50000-4000=46000 N?
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system
$$M(t) = M_{C} + m(t)$$
$$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$
$$P_i = Mv + u \, dm$$
$$P_f = (M + dm)(v + dv)$$
$$\Delta P = M \, dv + (v - u) \, dm$$
$$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$
$$F = u \frac{dm}{dt} = \rho A u^2$$
from conservation of momentum , the cannon recoils with the same force which it applies.
$$\quad \frac{dm}{dt}...
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook.
Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water.
I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
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